Primality testing 31898^33837-33837^31898 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 37, base 1+sqrt(37)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
31898^33837-33837^31898 is Fermat and Lucas PRP! (1053.1565s+0.0031s)

Sieved with xyyxsieve

To be completed...